Trolley.



I. E. MGCRACKEN. TROLLEY APPLICATION FILED MAY 13, 1914,

1,125,589, Patented Jan. 19, 1915.

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ISAAC 151. MeonAoKnn, or rirrsnonsn, PENNSYLVANIA, ASSIGNOR or ONE-HALF TO CARL P. SEYLER.

, TROLLEY.

Application filed. May 13, 1914-.

To all whom it may concern Be it known that I, IsAA'o E. lVICCRACKEN, a resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Trolle s of which the followin is a s eciy 7 g P fication.

This invention relates to trolleys.

The object'of the invention is to provide a simple trolley which is compact, which lies close to the car when pulled down, which has .wide range ofmovement,which is very flexible but at the same time is strong and serviceable and readily follows all bends'in the trolley wire, and which can be made at low cost and applied readily to any type of car.

and arrangement of parts hereinafter described and claimed.

In the drawings F igure 1 represents a plan View of a trolley embodying the invention; Fig. 2 is a side elevation thereof and in dotted lines showing the trolley down and in full lines elevated with the wheel in contact with the trolley wire; Fig. 3 is a plan View of the base; Fig 4 is a sectional elevation on the line M, Fig. 1; and Fig.

5 is a View showing a modification.

The trolley shown in the drawings com-- prises a base or support 1, which may be'of any suitable construction, and which is shown as a ring formed of cast steel or the like and having its underside provided with a pair of cross bars 2, which may be integral with or suitably secured to said body, and which are provided with the necessary apertures 3 for receiving screws or bolts for firmly securing it to the car roof 4. These cross bars space the ring like base away from the car roof so that water or moisture will not collect within said base. The base is surrounded by a carrier which consists of a ring 5, which may be solid but is shown as a split ring formed of two halves which are provided with ears 6 through which suitable bolts 7 are passed for securing the ring around the base. The peripheral portion of thebase 1 and the inner face of the ring carrier 5 are provided with raceways S to receive a series of anti-friction members, such as the balls 9 to enable the carrier to rotate freely about the base. To the base is bolted-or otherwise secured a cover cap 1*,

Specification of Letters Patent.

The invention comprises the construction Patented Jan. it), 1915.

Serial No. 838,319.

which covers thejoint between the base 1 are pivoted a pair of arms 11, shown as angle irons provided with the necessary fittings at their lower ends for produclng a strong and solid pivotal connection. At

their outer ends said arms are pivot-ally connected by the'pins 12 to the parallel side members of a"rectangular frame 13. Said frame consists of suitable bent metal members, for example angle sections, which at one end are riveted or otherwise secured to ,a casting 14 having socket 15 in which is rigidly and detachably secured the trolley pole 16 having the usual trolley wheel 17 at its outer end. One end portion of the frame 13 consists of a cross bar 18 lying between the two parallel side members of said frame.

This 'end of the trolley frame is held down close to the car under all movement of the trolley by any suitabl means, such as a guide rail or. the like secured to thecar roof or to any other suitable support. As shown the holding means comprises a rigid bar or rod 19 wlnch 1S fixedly clamped. between two of the ears 6 at one side of the ring carrier 5, and which extends horizontally over the car *roofand turns with the ring carrier.

The cross bar 18 slides beneath the holding .member 19 as the trolley pole rises and falls.

The trolley is held yieldingly against the trolley wire by one or a'plurality of tension springs 20, two being shown, which are connected at one'end to the ring carrier 5 and at the other end to the cross bar 18, but which may connect the cross bar 18 of the frame 13 to the side arms 11, as shown in Fig. 5.

In use of the trolley it occupies the 7 position shown in full linesin Fig. 2, with able length and consequently do not need to be of a very heavy material so that the trolley as a whole is very flexible and yields readily and at the same time has consider able strength. It also follows quickly all bends in the trolley Wire and prevents arcing or escape of the wheel from the Wire at a sudden rise in the wire. The trolley of course swings or pivots around the base 1 in the usual manner to permit the wheel to follow the trolley wire around curves.

The frame 13 is of material length and when the trolley is pulled down against the car roof, lies on both sidesof the base 1 so that the trolley pole may be short and consequently is not so liable to bend or become distorted. Morever, in the retracted position shown in dotted lines in Fig. 2 the whole mechanism lies close to the car roof and takes up but little space. The construction is simple and can be manufactured and applied readily at low cost to all types of cars.

What I claim is l. A trolley, comprising a base, .a carrier thereon, an arm pivotally connected to said carrier, a frame pivotally connected inter mediate its ends to said arm and having its lower end horizontally movable, a trolley wheel carried by the upper end of said frame, and yielding means connected to said frame for elevating the trolley wheel and moving the lower end of said frame horizontally.

2. A trolley, comprising a base, a carrier rotatable thereon, an arm pivotally connected to said carrier, a frame pivotally connected intermediate its ends to said arm and carrying a trolley wheel at its upper end, the lower end of said frame being horizontally movable, and yielding means connected to the lower end of said frame for eleyating the trolley wheel and moving the lower end of said frame horizontally.

3. A trolley, comprising a base, a carrier rotatable thereon, an arm pivotally connect- ,ed to said carrier, a frame pivotally connected to said arm and carrying a trolley wheel at one end and having its other end movable, means connected to said frame for moving both the arm and frame and there-' by yieldably holding the trolley wheel in contact with the trolley wire, and means for preventing other than horizontal movement of'one end of said frame.

4:. A trolley, comprising a base, a carrier rotatable thereon, an arm pivotally connected to said carrier, a frame pivotally connected to said arm and having its lower end movable in a horizontal path, a trolley pole carried by said frame, and means connected to said frame for elevating its upper end.

' A trolley, comprising a base, a carrier rotatable thereon, arms pivotally connected to said carrier, a frame pivotally connected to said arms and having its lower end movable in a horizontal path, a trolley pole carrying a wheel and supportedby the upper end of said frame, and a spring connected to the lower end of said frame for holding the trolley wheel yieldingly in contact with the trolley wire.

6. A trolley, comprising abase, a carrier rotatable thereon, arms pivotally connected to said carrier, a frame pivotally connected to said arms, a trolley wheel. carried by one end of said frame, and a spring connected to the other end of said frame and arranged to move the same horizontally and hold the trolley wheel yieldingly in contact with the trolley wire.

7. A trolley, comprising a base, a carrier rotatable thereon, arms pivotally connected to said carrier, a frame pivotally connected to said arms and having one end movable vertically and the other movable horizontally, a trolley wheel carried-by the upper end of said frame, a spring connected to the lower end of said frame, and means for 1 preventing other than horizontal movement of the lower end of said frame. l

8. A trolley, comprising a base, a carrier rotatable thereon, arms pivotally connected to said carrier, a frame pivotally connected to said arms, a trolleywheel carried by one end ofsaid frame, aspring connected to the other end of said frame, and means carried by said carrier for holding down the other end of said frame.

In testimony whereof, my hand.

ISAAC n. riconacnnn.

I have hereunto set lVitnesses ELBnn'r L. HYDE, \VILLIAM B. VVHanToN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

